With the update to macOS Seirra 10.12 and iOS10 we've observed a trend in Apple product quality that has degraded. It appears that each of these updates now run exteremly slow and the updates contain numerous bugs. In this case "Anyone can code but not everyone can launch an Apple Playground"
As an example - on XCode Version 8.0 (8A218a) we have tried every suggestion on this forum in trying to get a new Playground to launch for iOS and macOS however the default template from Apple does not want to run at all. Here are the errors shown after simply launching an iOS Playground, has anyone found a productive solution to this issue??????
Playground execution failed: error: Couldn't lookup symbols:
* thread #1: tid = 0x39ef7, 0x000000010c9b43c0 MyPlayground`executePlayground, queue = 'com.apple.main-thread', stop reason = breakpoint 1.2
* frame #0: 0x000000010c9b43c0 MyPlayground`executePlayground
frame #1: 0x000000010c9b39c0 MyPlayground`__37-[XCPAppDelegate enqueueRunLoopBlock]_block_invoke + 32
frame #2: 0x000000010d7b125c CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 12
frame #3: 0x000000010d796304 CoreFoundation`__CFRunLoopDoBlocks + 356
frame #4: 0x000000010d795a75 CoreFoundation`__CFRunLoopRun + 901
frame #5: 0x000000010d795494 CoreFoundation`CFRunLoopRunSpecific + 420
frame #6: 0x0000000112948a6f GraphicsServices`GSEventRunModal + 161
frame #7: 0x000000010e33ff34 UIKit`UIApplicationMain + 159
frame #8: 0x000000010c9b36e9 MyPlayground`main + 201
frame #9: 0x0000000110a9a68d libdyld.dylib`start + 1